Spraying-machine



H. C. BAUMGARDNER.

SPRAYING MACHINE.

APPLICATION FILED SEPT. 13! I920.

Patented May 10, 1921.

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SPRAYING MACHINE.

APPLICATION FILED SEPT. 13 1920.

Patented May 10, 1921.

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HCfiaz/Lmyardner UNITED STATES HENRY C. BAUMGARDNER, OF ANN ARBOR,MICHIGAN.

SPRAYING-MACHINE.

Specification of Letters Patent.

' Patented May 10, 1921.

Application filed September 13, 1920. Serial No. 409,766.

To all whom it may concern:

Be it known that I, HENRY C. BAUM- GARDNER, a citizen of the UnitedStates, re siding at Ann Arbor, 1n the county of VVashtenaw and State ofMichigan, have invented certain new and usefullmprovements inSpraying-Machines, of which the following is a specification.

This invention relates to a compressed air spraying machine mainlydesigned for farm and orchard work, the general ob ect oi the inventionbeing to provide a continuous spray with a comparatively small amount ofcompressed air.

Another object of the invention 1s to provide a number of tanks similarto that which forms the subject matter of an application filed by me onMay it, 1920, Serial l\ '0. 381,242, with means for alternatelysupplying the tanks with compressed-air and with the spraying solution.

A further object of the invention is to provide a system of valves forautomatically connecting one tank with the reservoir containing thespraying solution and the other tank, which is receiving the compressedair, with the spray nozzle so that one tank s being filled while theother is being emptied.

A further object of the invention is to provide automatic means,preferably operated by the power means for furnishing the compressedair, for alternately supplying the tanks with compressed air.

A still further object of the invention is to provide a container forsupporting the collapsible holder for the liquid in each spray tank andto form perforations in said container for permitting the compressed airto act on the collapsible holder.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illus trated in the accompanying drawlngsand specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the sc eral views, and in which Figure 1is a diagrammatic view of the complete device.

Fig. 2 is a longitudinal sectional view through the spray tanks and thevalve controlled pipes connecting the tanks with the reservoir.

The remaining figures are detail views of the various parts of theapparatus.

In these views A and B indicate a pair of compressed air tanks which areconstructed somewhat similar to the tank shown in the before mentionedapplication. Each tank comprises an outer cylinder 1 which has its upperend closed by a cap 2 which is detachably held to the cylinder by thepivoted bolts and their nuts 3. The collapsible container l is supportedin the cylinder by a perforated cylinder 5 which is detachably connected to cap 2. This perforated cylinder not only acts as a support forthe collapsible member but its perforations act to equalize the pressureof the air upon the cylinder.

he reservoir C, for containing the spraying solution, is connected withthe collapsible members A of tanks A and B by the pipe 6 which has thebranches 7 and 8 which pass through the caps 2 and are suitably connected with the collapsible members 4. These two branches. arevconnected together by the cross pipe 9 which is provided with a stem 10for receiving the tube 11 which carries the nozzle 12. A downwardlyopening valve 13 is placed in each of the pipes 7 and 8 and a pair ofvalves 14 are placed in pipe 9, one on each side of stem 10, and thesevalves open toward each other.

It will thus be seen that the pressure of the liquid in the reservoirwill tend to open the valves 13 while the pressure within the tanks Aand B will tend to close said valves. This pressurealso tends to openthe valves 14. Therefore when pressure is in one tank and the other tankis tree of pressure the spraying solution will pass through the valve 13into the collapsible member of the tank which is free of pressure whilethe com pressed air in the other tank willdrive the solution in thecollapsible member of this tankthrough valve 14:, into stem 10 andthrough tube 11 to the nozzle. The pressure in pipe 9 and stem 10 willcause the other valve is to close and this pressure will also hold thesecond valve 18 closed against the pressure of the solution in thereservoir. As soon as the pressure is supplied to the other tank and thepressure in the opposite tank is shut off the actionwill be reversed sothat the full tank will be connected with the spray nozzle and the emptytank with the Cir reservoir. This action will be kept up indefinitelyuntil the solution in the reservoir is used up or unless the supply ofcompressed air is out off.

At the point of entrance of the compressed air to each tank A and B Ileave a portion of each perforated cylinder 5 unperforated so that theair striking this solid part will be deflected and will be preventedfrom striking the collapsible member with its full force. This solidpart is shown at 5.

I provide an air reservoir 15 which may be provided with a gage 16 and arelief valve 17 and I connect this reservoir to any suitable form of aircompressor, which is indicated at 18. This compressor may be actuated byany suitable form of motor, as shown at 19. A line of piping 20 runsfrom the air reservoir to each of the tanks A and B, the outlet ends ofsaid pipes being placed opposite the solid parts 5 on the perforatedcylinders, as before described. A valve 21 is located in each pipeline,each valve being provided with an exhaust 22, and the plug of each valveis so formed that it can be moved into position to connect theairreservoir with the pressure tank or the pressure tank with theexhaust.

The valves may be operated by the cams 23 located on the shaft 24 whichmay be driven in any suitable manner from the engine 19. These camsactuate the valves through means of the levers 25 and the links 26.

I may place a valve 27 adjacent the connection of the pipelines with theair reservoir so as to cut off these lines from the reservoir whendesired or necessary and I may also place a valve 28 in the pipe 6 forshutting off the spray solution reservoir from the tanks.

I prefer to form the cams 23 in such a manner that one cam will hold thevalve controlling one of the pipelines open for a longer period of timethan the other valve is kept open by its cam so as to insure acontinuous spray at the nozzle. For instance, I may form the cam whichcontrols the valve for tank A so that it will hold the valve open forthirty seconds and close it for thirty seconds while the other cam willhold the valve of tank B open'for forty seconds and closed for twentyseconds. We.

therefore have a pressure in one tank of thirty seconds and a pressurein the other tank of forty seconds as well as pressure in both tanks forten seconds due to the overlap caused by the one cam having ten secondsmore high portion than the lower portion. There is therefore always astrong and continuous pressure on one or the other of the two pressurespray tanks.

Valve 27 can also be used to regulate the air pressure to the pressuretanks.

It will be seen that by my invention a continuous spray is secured witha comparatively small amount of air pressure. The pressure beingalternately supplied to tanks A and B while the valves automaticallycontrol the flow of solution from the reservoir into said tanks.

I may place a gage 10 on the stem 10 for indicating the pressure of thesolution passing to the nozzle.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope of the appended claims.

What I claim is 1. A spraying apparatus comprising a pair of pressuretanks, a reservoir, a branch pipe connecting the said tanks with thereservoir, a nozzle carrying pipe connected with the branches of saidpipe, means for alternately supplying compressed air to the tanks andvalves in the branches of the supply pipe and in said nozzle carryingpipe for automatically controlling the flow of solution from thereservoir to the tanks and the solution from the tanks to the nozzle.

2. A spraying apparatus of the class described comprising a pair ofspray tanks, a reservoir, a branch pipe connecting the reservoir withthe tanks, a cross pipe connecting the branches together, a stem on thecross pipe, a nozzle carrying tube con nected with the stem, downwardlyopening valves in the branches above the cross pipe, outwardly openingvalves in the cross pipe, one on each side of the stem and means foralternately supplying compressed air to the spray tanks.

3. A spraying apparatus of the class described comprising a pair ofspray tanks, a reservoir, a branch pipe connecting the same with thetanks, a nozzle carrying pipe con necting the branches of the pipestogether, valves in said pipes, a source of compressed air pipes forconnecting the same with the spray tanks, valves in said pipes and meansfor actuatingsaid valves so as to alternately connect one tank with thecompressed air tank and the other tank with the exhaust and vice versa.

4. A spraying apparatus of the class described comprising a pair ofspray tanks, a reservoir, a branch pipe connecting the reservoir withthe spray tanks, a nozzle carrying pipe connected with the branches,valves for controlling the connections between the tank-s and reservoirand between the tanks and the nozzle carrying pipe, a compressed airtank, pipes connecting the same with the spray tanks, controlling valvesin said pipes, means for actuating said valves so as to alternatelyconnect the tanks with the air pressure tank and means for adjusting theamount of air passing from the compressed air tank. I

5. A spraying apparatus of the class de- 5 scribed comprising a spraytank including an outer cylinder, an inner perforated cylinder having asolid part, the outer cylinder having an air inlet located opposite thesolid part and a collapsible member Within the perforated cylinder forcontainingthe spraying solution.

In testimony whereof I afix my signature.

HENRY C. BAUMGARDNER.

